| Column I | Column II | ||
| A. | Porifera | P | Metagenesis |
| B. | Cnidaria | Q | Flame cells |
| C. | Ctenophora | R | Comb Plates |
| D. | Platyhelminthes | S | Choanocyte |
| A | B | C | D | |
| 1. | R | Q | S | P |
| 2. | S | P | R | Q |
| 3. | P | S | Q | R |
| 4. | Q | R | P | S |
| 1. | Portuguese man-of-war, Sea anemone, Sea-pen and Sea-fan |
| 2. | Scypha, Fresh water sponge, Bath sponge and Brain Coral |
| 3. | Roundworm, Filaria worm, Hookworm and Tapeworm |
| 4. | King crab, Mosquito, Silkworm and Blood sucking leech |